﻿#region License
// Copyright 2010 Buu Nguyen (http://www.buunguyen.net/blog)
// 
// Licensed under the Apache License, Version 2.0 (the "License"); 
// you may not use this file except in compliance with the License. 
// You may obtain a copy of the License at 
// 
// http://www.apache.org/licenses/LICENSE-2.0 
// 
// Unless required by applicable law or agreed to in writing, software 
// distributed under the License is distributed on an "AS IS" BASIS, 
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
// See the License for the specific language governing permissions and 
// limitations under the License.
// 
// The latest version of this file can be found at http://www.codeplex.com/aspmvcvalidation
#endregion

using System;

namespace Mvc.Validation.Validators
{    
    /// <summary>
    /// Validates a property using jQuery remote function on the client-side.  On the server-side
    /// a customer validator must be specified to actually carry out the validation.  
    /// </summary>
    [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
    public sealed class RemoteValidatorAttribute : DelegatingValidatorAttribute
    {
        /// <summary>
        /// The endpoint that will be invoked by jQuery's remote to get validation result.
        /// </summary>
        public string ServerMethod { get; set; }

        /// <summary>
        /// Whether the endpoint expects GET or POST method.
        /// </summary>
        public bool IsPost { get; set; }

        public override string ClientFunctionName
        {
            get { return "remote"; }
            set { throw new NotImplementedException("Can't set ClientFunctionName of this attribute"); }
        }

        protected internal override string RuleParameter
        {
            get
            {
                return string.Format("{{url: \"{0}\", type: \"{1}\"}}", ServerMethod, IsPost ? "post" : "get");
            }
        }
    }
}
